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EN10025 S355J2 is low alloy steel commonly used in Europe. EN10025 S355J2 equivalent grade in China is Q345D. Their chemical composition is slightly different and mechanical properties are similar.
Chemical composition of S355J2 steel and EN10025 S355J2 equivalent grade Q345D:
| Grade | C | Si | Mn | P | S | Cu | N | Nb | V | Ti | Cr | Ni | Mo | B | Als |
| S355J2 | 0.24 | 0.60 | 1.70 | 0.035 | 0.035 | 0.60 | 0.014 | - | - | - | - | - | - | - | - |
| Q345D | 0.18 | 0.50 | 1.70 | 0.030 | 0.025 | 0.30 | 0.01 | 0.07 | 0.15 | 0.20 | 0.30 | 0.50 | 0.10 | - | 0.015 |
Mechanical properties of S355J2 steel and EN10025 S355J2 equivalent grade Q345D:
| Grade | Yield strength ReH/(N/mm2) (t≤16mm) min | Tensile strength Rm/(N/mm2) (3mm≤t≤16mm) | Elongation A/%(3mm≤t≤40mm) min | Charpy V test | |
| Temperature/℃ | Impact energy (Longitudinal)/J min | ||||
| S355J2 | 355 | 450-680 | 22 | -20 | 27 |
| Q345D | 345 | 470-630 | 21 | -20 | 27 |
In terms of chemical composition and mechanical properties, the S355J2 steel and EN10025 S355J2 equivalent grade Q345D almost can be used to replace each other. However, in actual application, it is better to ask for technician or engineer approval if you want to use one to instead the other.
